Bill Gates thinks that Microsoft Bob, or at least the concept, will come back to life as intelligent personal agents become part of everyday computing. Microsoft Bob, introduced by Gates at the Consumer Electronics Show in January 1995, provided a virtual house with rooms and doors and cartoon character assistants to help users navigate Windows and perform tasks with Microsoft applications. For example, users could log in by clicking on a door knocker or launch the calendar application by clicking on a calendar hanging on a wall. (Read Harry McCracken's fine history of Microsoft Bob.)